There is no explanation. According to China's postgraduate entrance examination official website, the teaching and scientific research of Dalian Maritime University does not occupy ordinary scientific research places. Compared with ordinary research, the requirements for teaching and research will be relatively relaxed, and more attention will be paid to personal ideological quality and volunteer service consciousness. Teaching and research protection refers to a way of scientific research protection in which you are selected into the postgraduate education group through certain assessment in your senior year, and after a period of systematic training, you will teach in a designated area for one year after graduation, thus obtaining the qualification of scientific research protection.